CTS Turbo EA113 2.0T BOSS500 Turbo Kit (MK5 GTI/Jetta, MK6 Golf R, 8P Audi A3/S3)

CTS Turbo is proud to announce the release of the BOSS500 for FSI (timing-belt motor) owners. After a long and tedious R&D process, our engineers have finalized this turbo upgrade kit to create a modular package that is capable of producing upwards of 600hp and has the long-term reliability. At the heart of our aptly named BOSS (Bolt-On Speed Solution), FSI upgrade kit uses our own CHRA, it is installed into a CTS proprietary exhaust housing. The housing is carefully cast and machined in house to be compatible with any exhaust downpipe and the scroll area was designed to be approximately 0.63AR. This results is an excellent boost response and eliminates any possible restriction. Don't be fooled by other manufacturers putting a larger turbo into a stock housing. It is not beneficial, and that is why we made our own! Custom oil/water lines complete this kit to offer simple installation, simple tuning, and problem-free operation. Proprietary custom molded silicon hoses connect the turbo to your turbo outlet pipe and intake. Currently, the BOSS turbo upgrade is only compatible with CTS Turbo intake, however, other intakes could be made to work - unfortunately, we cannot provide guidance for installing other manufacturer's intakes. You can use a CTS Turbo or other billet diverter/blow-off valve. Only OEM or CTS turbo outlet pipe is compatible at this time. MK6 Golf R or 8P Audi S3 will require a DV block-off plate, please see below. DOES NOT FIT RIGHT-HAND DRIVE Product contents: - CTS Turbo Gen2 GTX 50/67 dual ball-bearing CHRA with 8 blade billet compressor wheel - CTS Turbo exhaust housing - CTS Turbo wastegate bracket - CTS Turbo 4-ply silicone couplers - CTS Turbo oil lines - CTS Turbo water lines - Hardware required for installation  Product features: - 400hp to 500hp capable (depending on fueling and engine mods) - Direct bolt-on without any modifications to the car - Compatible with CTS Turbo intake and factory DV or CTS DV/BOV - Compatible with factory or CTS Turbo turbo outlet pipe - Compatible with any exhaust downpipe - Tuning available for stock fueling and for upgraded fueling from United Motorsport and Eurodyne  

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Fits These Vehicles 10 applications

GTI

Make	Model	Engine	Years
VW	GTI		2008–2009
VW	GTI (MK5)		2008–2009

JETTA

Make	Model	Engine	Years
VW	JETTA		2008–2010
VW	JETTA (MK5)		2008–2010

A3

Make	Model	Engine	Years
AUDI	A3		2008–2013
AUDI	A3 (8P)		2008–2013

S3

Make	Model	Engine	Years
AUDI	S3		2008–2012
AUDI	S3 (8P)		2008–2012

GOLF R

Make	Model	Engine	Years
VW	GOLF R		2012–2013
VW	GOLF R (MK6)		2012–2013

Fitment data last updated: 2026-09-13

✓ Fits 10 vehicle applications Check vehicle fitment before ordering View fitment